New issues - Известия Казанского государственного архитектурно-строительного университета.

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First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address.Evgeniy A. Vdovin, candidate of Engineering Sciences, assistant professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Pavel E. Bulanov, candidate of Engineering Sciences, assistant professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Bulat K. Khusaenov, lead Engineer, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it Daniil R. Vybornov, bachelor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation E-mail: This e-mail address is being protected from spambots. You need JavaScript enabled to view it
Title of the articleModification of road soil-cement with nanosilica
Abstract.The relevance of the study is justified by the need to increase the level of construction and technical characteristics and durability of soil-cement in pavement layers, as well as to reduce the content of mineral binder in reinforced soils, using nanosilica as an effective modifier. The aim of the work is to study the physical and mechanical characteristics of soil-cement modified with nanosilica. Results. The effect of modification of soil-cement with nanosilica on the levels of indicators of compressive strength, tensile strength in bending and freeze-thaw durability has been established. The optimal content and efficiency of nanosilica for soil-cement, which ensure their possible use in the structural layers of pavements, has been determined. Conclusions: It has been established that the modification with nanosilica ensures that the soil-cement achieve the M40 strength grade with a content of 8 % Portland cement and 0.6 % modifier or 10 % Portland cement and 0.45 % modifier by weight of the soil. Based on the regulatory requirements, the developed modified soil-cement can be used for the construction of structural layers of bases and coatings of transitional and lightweight types of pavement, depending on road and climatic conditions. However, insufficient values of frost resistance coefficients limit the applicable scope of the obtained cement soils in pavements. For further increase of the levels of physical and mechanical characteristics, additional studies on the processes of modifying soil-cement with nanoparticles are needed.
Keywords.soil-cement, nanosilica, clay, strength, freeze-thaw durability, vortex apparatus
For citations:Vdovin E.A., Bulanov P.E.,. Khusaenov B.K, Vybornov D.R. Modification of road soil-cement with nanosilica // News KSUAE, 2023, № 3(65), p.154-162, DOI: 10.52409/20731523_2023_3_154, EDN: LEHMXN


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